Bottle cap



FIG. 1 is a perspective view of a bottle cap in an open position;

FIG. 2 is a left side view thereof, with the right side view being a mirror image thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a front elevation view;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines depict environment and form no part of the claimed design. 

CLAIM The ornamental design for a bottle cap, as shown, and described. 